B.5 Basic Information On Position Control - Festo CPX Series Manual

B. Basic controlling principles
B.5 Basic information on position control
Identification
Adaptation
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH
The basis for control of the pneumatic axes is a model control
path stored in the CMAX. This model assumes a pneumatic
axis which is built up in accordance with specifications, e.g.
with regard to:
the compressed air provided
the valve−cylinder combination used
the permitted mass load
tube sizes and lengths, etc.
The basic parameters of this control path are:
the axis and application data,
internal data ascertained by the identification and by
adaptation.
During commissioning, variables such as the maximum
achievable speed, acceleration ability, static friction and
valve characteristics are ascertained based on a dynamic
and static identification travel.
With adaptation, the positioning behaviour is continuously
monitored during operation. Internal controller data is
adapted here to the actual state of the axis, e.g. in order to
compensate for system wear etc. during the service period.
B−19